混沌易碎水印的图象可靠性研究  

Research of Image Authentication Based on Chaotic Fragile Watermark

作　　者：邵钢锤[1] 张敏瑞[1] 刘亚光[2] 

机构地区：[1]西安科技大学通信与信息工程学院,陕西西安710054 [2]信息工程大学信息工程学院,河南郑州450002

出　　处：《信息工程大学学报》2004年第1期10-12,共3页Journal of Information Engineering University

基　　金：陕西省自然科学基金项目(2002F32)

摘　　要：文章讨论了易碎数字水印在数字图象防篡改中的应用,提出了一种新的混沌易碎数字水印算法以及相应的篡改检测方法。构造了一种新的水印预处理的方法,使处理后的水印信号具有对初值敏感的混沌特性。在图象离散小波域的低频中嵌入混沌水印信号,可以检测图象的局部变化,给出篡改相应的位置信息,并且对有损压缩和加噪有一定的抵抗能力。实验仿真证明该方法是有效的。The application of fragile digital watermarking for the tamper-proofing of digital image is discussed in this paper. A novel chaotic fragile watermarking scheme and a related tamper detection approach are put forward. A new watermarking pre-processing method is proposed so that processed watermarking has a character of sensitive to initial inputs. In still images for example, the chaotic watermarking is embedded in low frequency of digital wavelet domain of image. It can detect changes in image and the tampered place is given. And it also has some resistance with lossy compression and noise. The result of the experiment shows that this method is effective.

关 键 词：易碎水印 可靠性鉴定 混沌系统 离散小波变换 

分 类 号：TN919.8[电子电信—通信与信息系统]